Description With it, the 118Mhz-138Mhz aviation band can be down-converted to the SW shortwave band received by ordinary radios, allowing ordinary radios to easily achieve aviation band reception. Support conversion between high-impedance converter and aviation frequency converter, It can achieve good matching and work with magnetic rods, passive small loop antennas, rod/whip antennas, and other antennas. Improve reception. It can achieve high-impedance antenna input matching for malachite or standard 50 ohm input receivers and mobile phones. Compact and portable, with built-in 700mAh battery and USB-C port for charging. It is really a must-have tool for traveling at home and listening to the radio! It can last up to 60 hours when used in high-impedance amplifier functions, and can last up to 23 hours when used in aviation inverters. Aviation frequency converter, aviation band frequency conversion to short wave, aviation frequency converter + high impedance amplifier 2-in-1 artifact. Type:100M Colour:Black Material:Metal Package Contents: 1 * Aviation frequency converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.